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How to Repair a Remote Key Although most remote key fobs have excellent battery life, they'll eventually get worn out. Sometimes it's as simple as changing the batteries, but occasionally there are more serious problems. A quick fix that can help is dismantling the remote and cleaning the buttons before flexing them in and out. These methods could be all you need to get your key fob to work. Battery If the fob is still working it is possible to swap out the CR2025 or CR2032 battery. If not, you can inspect the battery terminals or buttons to determine if there are any loose parts. You should be able to solder the buttons and terminals back into place. However, you will be required to know which kind of battery is being used in your fob. If you're unsure whether the battery is the issue you can make use of a backup fob to unlock or start your car. If you're able to, it's probably time to replace the primary fob. If not, you will require a professional to examine it to find the problem. It could be as simple as reprogramming, or it could require other types repair. There's also the possibility that your vehicle lost your fob, which isn't something you can fix yourself. Case The plastic housing that covers the outside of a remote is known as the case. It is usually equipped with an alternative button pad. It is essential to choose a new case as the original will probably be a bit shabby and it is crucial that the circuit board is placed correctly inside the case. The circuit board controls the key fob's function. You can test it by using a multimeter set to RF (radiofrequency) mode and a scanner that is tuned to the same frequency as the key fob. Check the contact points of the buttons on the keypad. They could have become loose over time or broken. A careful soldering process to put them back in their original position can usually restore them to full functionality unless they break completely. Buttons If the buttons on your key fob are no longer working or are difficult to press, you can buy an alternative dorman or Motormite remote key housing online for the lowest cost for your model/year/make. Then pop the circuit board out of your old case into the new. On some models it may be necessary to move the board slightly. Then, you can use aluminum foil using double-sided tape to adhere it to the black contact points on the buttons. Programming The key fob is linked with the receiver in your vehicle, and this connection could be damaged. A professional will assess your car to determine its make, year and model. They will then employ specialist equipment to reconnect or program a blank transponder chip or fob (or copy the key, if possible). Then, keys repair test the remote to be sure it works. When reprogramming keys that are blank it is crucial to be careful. The process is complicated and each manufacturer offers different instructions. It is easy to miss a crucial step or to take too long to exit the programming mode. To minimize the risk of damaging your car, it is best to hire an expert with extensive knowledge of the security system in your vehicle. Certain programming tools that are essential to use can also identify diagnostic trouble codes in your vehicle. This can assist you to repair or troubleshoot other issues.